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From a57558fc97a82853d0c5e1e190297f7677598d5a Mon Sep 17 00:00:00 2001
From: Thomas Huth <thuth@redhat.com>
Date: Mon, 15 Oct 2018 10:19:29 +0100
Subject: s390x/ap: base Adjunct Processor (AP) object model
RH-Author: Thomas Huth <thuth@redhat.com>
Message-id: <1539598771-16223-5-git-send-email-thuth@redhat.com>
Patchwork-id: 82695
O-Subject: [RHEL-8 qemu-kvm PATCH 4/6] s390x/ap: base Adjunct Processor (AP) object model
Bugzilla: 1508142
RH-Acked-by: David Hildenbrand <david@redhat.com>
RH-Acked-by: Cornelia Huck <cohuck@redhat.com>
RH-Acked-by: Jens Freimann <jfreimann@redhat.com>
From: Tony Krowiak <akrowiak@linux.ibm.com>
Introduces the base object model for virtualizing AP devices.
Signed-off-by: Tony Krowiak <akrowiak@linux.ibm.com>
Tested-by: Pierre Morel <pmorel@linux.ibm.com>
Acked-by: David Hildenbrand <david@redhat.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Halil Pasic <pasic@linux.ibm.com>
Tested-by: Christian Borntraeger <borntraeger@de.ibm.com>
Message-Id: <20181010170309.12045-5-akrowiak@linux.ibm.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
(cherry picked from commit a51b31535a8ec13997de29b357f7cc1dcd8a7f9c)
Signed-off-by: Danilo C. L. de Paula <ddepaula@redhat.com>
---
MAINTAINERS | 12 +++++++
hw/s390x/Makefile.objs | 2 ++
hw/s390x/ap-bridge.c | 78 ++++++++++++++++++++++++++++++++++++++++++++
hw/s390x/ap-device.c | 38 +++++++++++++++++++++
hw/s390x/s390-virtio-ccw.c | 4 +++
include/hw/s390x/ap-bridge.h | 19 +++++++++++
include/hw/s390x/ap-device.h | 22 +++++++++++++
7 files changed, 175 insertions(+)
create mode 100644 hw/s390x/ap-bridge.c
create mode 100644 hw/s390x/ap-device.c
create mode 100644 include/hw/s390x/ap-bridge.h
create mode 100644 include/hw/s390x/ap-device.h
diff --git a/MAINTAINERS b/MAINTAINERS
index 666e936..d5b3c18 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -1184,6 +1184,18 @@ F: include/hw/s390x/s390-ccw.h
T: git git://github.com/cohuck/qemu.git s390-next
L: qemu-s390x@nongnu.org
+vfio-ap
+M: Christian Borntraeger <borntraeger@de.ibm.com>
+M: Tony Krowiak <akrowiak@linux.ibm.com>
+M: Halil Pasic <pasic@linux.ibm.com>
+M: Pierre Morel <pmorel@linux.ibm.com>
+S: Supported
+F: hw/s390x/ap-device.c
+F: hw/s390x/ap-bridge.c
+F: include/hw/s390x/ap-device.h
+F: include/hw/s390x/ap-bridge.h
+L: qemu-s390x@nongnu.org
+
vhost
M: Michael S. Tsirkin <mst@redhat.com>
S: Supported
diff --git a/hw/s390x/Makefile.objs b/hw/s390x/Makefile.objs
index 93282f7..add89b1 100644
--- a/hw/s390x/Makefile.objs
+++ b/hw/s390x/Makefile.objs
@@ -20,3 +20,5 @@ obj-$(CONFIG_TCG) += tod-qemu.o
obj-$(CONFIG_KVM) += s390-skeys-kvm.o
obj-$(CONFIG_KVM) += s390-stattrib-kvm.o
obj-y += s390-ccw.o
+obj-y += ap-device.o
+obj-y += ap-bridge.o
diff --git a/hw/s390x/ap-bridge.c b/hw/s390x/ap-bridge.c
new file mode 100644
index 0000000..3795d30
--- /dev/null
+++ b/hw/s390x/ap-bridge.c
@@ -0,0 +1,78 @@
+/*
+ * ap bridge
+ *
+ * Copyright 2018 IBM Corp.
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or (at
+ * your option) any later version. See the COPYING file in the top-level
+ * directory.
+ */
+#include "qemu/osdep.h"
+#include "qapi/error.h"
+#include "hw/sysbus.h"
+#include "qemu/bitops.h"
+#include "hw/s390x/ap-bridge.h"
+#include "cpu.h"
+
+static char *ap_bus_get_dev_path(DeviceState *dev)
+{
+ /* at most one */
+ return g_strdup_printf("/1");
+}
+
+static void ap_bus_class_init(ObjectClass *oc, void *data)
+{
+ BusClass *k = BUS_CLASS(oc);
+
+ k->get_dev_path = ap_bus_get_dev_path;
+ /* More than one ap device does not make sense */
+ k->max_dev = 1;
+}
+
+static const TypeInfo ap_bus_info = {
+ .name = TYPE_AP_BUS,
+ .parent = TYPE_BUS,
+ .instance_size = 0,
+ .class_init = ap_bus_class_init,
+};
+
+void s390_init_ap(void)
+{
+ DeviceState *dev;
+
+ /* If no AP instructions then no need for AP bridge */
+ if (!s390_has_feat(S390_FEAT_AP)) {
+ return;
+ }
+
+ /* Create bridge device */
+ dev = qdev_create(NULL, TYPE_AP_BRIDGE);
+ object_property_add_child(qdev_get_machine(), TYPE_AP_BRIDGE,
+ OBJECT(dev), NULL);
+ qdev_init_nofail(dev);
+
+ /* Create bus on bridge device */
+ qbus_create(TYPE_AP_BUS, dev, TYPE_AP_BUS);
+ }
+
+static void ap_bridge_class_init(ObjectClass *oc, void *data)
+{
+ DeviceClass *dc = DEVICE_CLASS(oc);
+
+ set_bit(DEVICE_CATEGORY_BRIDGE, dc->categories);
+}
+
+static const TypeInfo ap_bridge_info = {
+ .name = TYPE_AP_BRIDGE,
+ .parent = TYPE_SYS_BUS_DEVICE,
+ .instance_size = 0,
+ .class_init = ap_bridge_class_init,
+};
+
+static void ap_register(void)
+{
+ type_register_static(&ap_bridge_info);
+ type_register_static(&ap_bus_info);
+}
+
+type_init(ap_register)
diff --git a/hw/s390x/ap-device.c b/hw/s390x/ap-device.c
new file mode 100644
index 0000000..f5ac8db
--- /dev/null
+++ b/hw/s390x/ap-device.c
@@ -0,0 +1,38 @@
+/*
+ * Adjunct Processor (AP) matrix device
+ *
+ * Copyright 2018 IBM Corp.
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or (at
+ * your option) any later version. See the COPYING file in the top-level
+ * directory.
+ */
+#include "qemu/osdep.h"
+#include "qemu/module.h"
+#include "qapi/error.h"
+#include "hw/qdev.h"
+#include "hw/s390x/ap-device.h"
+
+static void ap_class_init(ObjectClass *klass, void *data)
+{
+ DeviceClass *dc = DEVICE_CLASS(klass);
+
+ dc->desc = "AP device class";
+ dc->hotpluggable = false;
+}
+
+static const TypeInfo ap_device_info = {
+ .name = AP_DEVICE_TYPE,
+ .parent = TYPE_DEVICE,
+ .instance_size = sizeof(APDevice),
+ .class_size = sizeof(DeviceClass),
+ .class_init = ap_class_init,
+ .abstract = true,
+};
+
+static void ap_device_register(void)
+{
+ type_register_static(&ap_device_info);
+}
+
+type_init(ap_device_register)
diff --git a/hw/s390x/s390-virtio-ccw.c b/hw/s390x/s390-virtio-ccw.c
index cdf4558..a4b8b62 100644
--- a/hw/s390x/s390-virtio-ccw.c
+++ b/hw/s390x/s390-virtio-ccw.c
@@ -32,6 +32,7 @@
#include "ipl.h"
#include "hw/s390x/s390-virtio-ccw.h"
#include "hw/s390x/css-bridge.h"
+#include "hw/s390x/ap-bridge.h"
#include "migration/register.h"
#include "cpu_models.h"
#include "hw/nmi.h"
@@ -263,6 +264,9 @@ static void ccw_init(MachineState *machine)
/* init the SIGP facility */
s390_init_sigp();
+ /* create AP bridge and bus(es) */
+ s390_init_ap();
+
/* get a BUS */
css_bus = virtual_css_bus_init();
s390_init_ipl_dev(machine->kernel_filename, machine->kernel_cmdline,
diff --git a/include/hw/s390x/ap-bridge.h b/include/hw/s390x/ap-bridge.h
new file mode 100644
index 0000000..470e439
--- /dev/null
+++ b/include/hw/s390x/ap-bridge.h
@@ -0,0 +1,19 @@
+/*
+ * ap bridge
+ *
+ * Copyright 2018 IBM Corp.
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or (at
+ * your option) any later version. See the COPYING file in the top-level
+ * directory.
+ */
+
+#ifndef HW_S390X_AP_BRIDGE_H
+#define HW_S390X_AP_BRIDGE_H
+
+#define TYPE_AP_BRIDGE "ap-bridge"
+#define TYPE_AP_BUS "ap-bus"
+
+void s390_init_ap(void);
+
+#endif
diff --git a/include/hw/s390x/ap-device.h b/include/hw/s390x/ap-device.h
new file mode 100644
index 0000000..765e908
--- /dev/null
+++ b/include/hw/s390x/ap-device.h
@@ -0,0 +1,22 @@
+/*
+ * Adjunct Processor (AP) matrix device interfaces
+ *
+ * Copyright 2018 IBM Corp.
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or (at
+ * your option) any later version. See the COPYING file in the top-level
+ * directory.
+ */
+#ifndef HW_S390X_AP_DEVICE_H
+#define HW_S390X_AP_DEVICE_H
+
+#define AP_DEVICE_TYPE "ap-device"
+
+typedef struct APDevice {
+ DeviceState parent_obj;
+} APDevice;
+
+#define AP_DEVICE(obj) \
+ OBJECT_CHECK(APDevice, (obj), AP_DEVICE_TYPE)
+
+#endif /* HW_S390X_AP_DEVICE_H */
--
1.8.3.1
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